// console.log(-0 === +0);
// console.log(Object.is(-0 === +0));

// console.log(NaN === NaN);
// console.log(Object.is(NaN === NaN));

let obj1 = {
  name: 'zhangsan'
}
let obj2 = {
  name: 'lisi',
  age: 12
}
let newObj = {};
Object.assign(newObj, obj1, obj2);
console.log(newObj)
// console.log(newObj === obj);



